diff --git a/pyad2usb/ad2usb.py b/pyad2usb/ad2usb.py
index 0d334d7..dd9987f 100644
--- a/pyad2usb/ad2usb.py
+++ b/pyad2usb/ad2usb.py
@@ -236,7 +236,7 @@ class AD2USB(object):
         self._fire_status = (False, 0)
         self._battery_status = (False, 0)
         self._panic_status = None
-        self._relay_status = dict()
+        self._relay_status = {}
 
         self.address = 18
         self.configbits = 0xFF00
diff --git a/pyad2usb/messages.py b/pyad2usb/messages.py
index c8c6dd7..a52b5fa 100644
--- a/pyad2usb/messages.py
+++ b/pyad2usb/messages.py
@@ -164,7 +164,7 @@ class RFMessage(object):
         self.value = None
         self.battery = None
         self.supervision = None
-        self.loop = dict()
+        self.loop = {}
 
         if data is not None:
             self._parse_message(data)